2.27 Data Analysis

Ursula surveyed 50 classmates about their favorite ice cream favors. Each classmate chose one favor. The results are shown in the circe graph.

How many more of Ursula's classmates chose chocolate than chose vanilla?

• 8

• 6

• 34

• 16

The bar graph shows a company's income and expenses over the last 5 years.

Which statement is supported by the information in the graph?

• Expenses have increased $200,000 each year over the last 5 years.

• The income in Year 5 was twice the income in Year 1.

• The combined income in Years 1, 2, and 3 was equal to the combined expenses in Years 1, 2, and 3.

• The combined expenses in Years 3 and 4 were $300,000 more than the combined income in Years 3 and 4.

The circle graph shows how Tremaine divided his time on the computer last week.

Tremaine used the computer a total of 30 hours last week. How many more hours did Tremaine use the computer to play games than to do research?

• 6 hours

• 20 hours

• 7.5 hours

• 1.5 hours

Maribel surveyed 55 people to find out their favorite types of music. The results are shown in the bar graph.

Based on the information in the graph, which types of music were chosen by 40% of the people surveyed?

• Country and opera

• Jazz and opera

• Jazz, opera, and rock

• Country, jazz, and rock

The dot plots show the numbers of miles Ian skated on several days in two different months.

Which statement is supported by the information in the dot plots?

• The least number of miles Ian skated on a day in July is greater than the least number of miles Ian skated on a day in August.

• The median number of miles Ian skated each day in July is greater than the median number of miles Ian skated each day in August.

• The mode of the number of miles Ian skated each day in July is less than the mode of the number of miles Ian skated each day in August.

• The range of the number of miles Ian skated each day in July is less than the range of the number of miles Ian skated each day in August.

The box plots show the lengths of the songs on two digital music players in minutes.

Which statement is best supported by the information in the box plots?

• The interquartile range of the data for Music Player X is equal to the interquartile range of the data for Music Player Y.

• The interquartile range of the data for Music Player X is greater than the interquartile range of the data for Music Player Y.

• The median length of the songs on Music Player X is equal to the median length of the songs on Music Player Y.

• The median length of the songs on Music Player X is less than the median length of the songs on Music Player Y.

The box plots show data about the number of years that farmworkers have been employed at each of two farms.

Which statement is best supported by the information in the box plots?

• The range of the data for Farm Y is equal to the range of the data for Farm X.

• The third quartile of the data for Farm Y is less than the third quartile of the data for Farm X.

• The median of the data for Farm Y is greater than the median of the data for Farm X.

• The first quartile of the data for Farm Y is greater than the first quartile of the data for Farm X.

The manager of a music store surveyed a random sample of customers who shop in the store about their favorite type of music. The table shows the number of customers who selected each type of music.

Based on the information in the table, which inference about the favorite type of music of all the customers who shop in the music store appears to be valid?

• They are certain to select rock or pop music.

• They are less likely to select country or rap music than rock music.

• They are more likely to select country music than jazz, classical, or rap music.

• They are certain to select any type of music other than jazz music.